High-energy neutrinos from radio galaxies

Understand

The IceCube experiment has recently reported the first observation of high-energy cosmic neutrinos.

• Their origin is still unknown.
• In this paper, we investigate the possibility that they originate in active galaxies.
• We show that hadronic interactions (pp) in the generally less powerful, more frequent, FR-I radio galaxies are one of the candidate source classes being able to accommodate the observation while the more powerful, less frequent, class of FR-II radio galaxies has too low of a column depths to explain the signal.